Nut-lock



(Nro Model.)

. G. WOODRING.

NUT LOCK.

No. 334,836. `Patented Jan. 26', 1886.

` WITH -EM H lJ'NirED STATES PArENT EEICE.

GIDEON VOODRING, OF DUBOIS, PENNSYLVANIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 334,836, dated January26, 1886.

Application filed March 2, 1885.

To @ZZ whom, it may concern:

Be it known that I, GIDEoN WOODRING, a citizen of the United States,residing at Dubois, inthe county of Clearfield and State ofPennsylvania, have invented certain new and useful Improvements inNut-Locks, of which the following is a specification.

My invention relates to improvements in nut-locks, and has for itsobject to provide a device which will be certain in its operation, andwhich will be free from the objections heretofore raised against'otherdevices for the same purpose.

It consists in the novel construction of the washer hereinafter fullydescribed, and speciflcally pointed out in the claim.

In the drawings, Figure l is an elevation showing my improved nut-lockin position. Fig. 2 is a horizontal longitudinal section on the line XX, Fig. l. Figs.3 and 4 are detail views of the washer.

My washer is constructed of a bar of metal or other suitable material,one end of which is turned outward and tapered, as shown at B. The otherend, a, is bent at right angles to the plane of the coil. The bar ishelically coiled, as will be clearly understood from the drawings, thepointed end being turned outward. The diameter of the helical coil ismade equal to the diameter of the nut,the advantage of whichconstruction will hereinafter appear. The sh-plate or other surfaceagainst which the nut is turned is provided with a notch, c, at somedistance from the bolt-hole, in which the bent end a of the washerengages. l form the washer from a bar of sufficient length to providethe arm al, which is formed by bending the washer at right anglesto itscircumference, as shown. The outer end of the arm d is then bent to formthe point ,which engages the retaining-notch.

The operation of my device will be readily l understood. After the bolthas been inserted through the bolt-hole, the washer is slipped over theend of the bolt and the point a fitted into the notch c. The nut is thenplaced on the bolt and turned home. The Washer, by

reason of being coiled h'elically, will not of itself lie flat againstthe fish-plate, and its tapered end will project outward, as shown andSerial No. 157,567. (No model.)

hereinbefore described. As the nut is turned on the bolt the coiledportion of the washer will be compressed, which will result in thepressure being applied to the nut, its tendency being to force the nutoff the bolt. The action of the spring will cause the threads in the nutto bind against the threads of the bolt, and the friction between thetwo threads will hold the nut in place. As the nut is turned farther onthe bolt the strength of the spring-washer will be increased, andconsequently the friction just referred to betweenV the two threads willbe augmented. By this it will be seen that the farther on the bolt thenut is turned the greater will be the action of the spiingwasher and themore securely will the parts be locked. lThe pressure will be equal onall parts of the nut, as the washer and nut are made of same diameter.The tapered point of the washer will bite against the under face of thenut and prevent any back ward rotation of the nut, unless the same iscaused by the application of a considerable degree of force. Thus itwill be seen that my device efficiently prevents the loosening of thenut by jarring, 85e.

Heretofore a washer has been used for lockA ing nuts made of a fiatcircular plate having one end bent downward to engage a slot in thebearing-plate, and having its other end bent to act as a spring-pawl toengage notches cut in the under face of the nut. Such a washer, however,will not act when a smooth-faced nut is used, and will at no time causethe threads of the nut to bind against the threads of the bolt; Ahelically-coil-ed bar has also been used for the same purpose; but suchbar has not heretofore been so constructed as to engage a retainingnotchin the flsh-plate,and was liable to slip around the bolt with the nut asthe same was turned home.

The. disadvantages of the constructions just referred to are entirelyobviated by my improvements, and a device is provided which is simple inconstruction, effective in operation, and can be manufactured at a smallcost.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

In a nut-locl, the combination of the bolt,

ICO

the nut having` a smooth inner face, the plate arm, the end of which isbent at right angles or bar provided with a retaining-notch, and toengage in a retaining-notch in the plate or the spring-Washer consistingof a helieallybar, substantially as shown and described.

coiled bar having its outer end pointed and GIDEON VOODRING. -5 turnedslightly upward tobite against the in- Witnesses:

ner face of the nut, and having its inner end C. E. BOSTWICK,

bent at right angles and extended t0 form an J. S. CARROLL.

